Two months ago this Friday, I started dating the man I have been best friends with for 10 years. He was afraid things would go badly and it would never be the same between us. So he friendzoned me for 7 years. But when it happened, finally, he became happier than I had ever seen him. And we are already so comfortable with each other, it's like we skipped the first year or so of normal stranger dating. Honestly, when he said he wanted to be with me, it was the second happiest moment I have ever experienced. It is second only to the moment he said "I love you" for the first time. It still gives me chills. If he asked me to marry him tomorrow, I would say yes in a heartbeat. But I'm the kind of girl that plans out her wedding at 6 years old. Yes, it turns out differently for everyone. For some, it goes horribly. For me, I've never been so happy. (I hope I'm not jinxing it.)
If you are that good of friends, just be honest with her about it. If she wants to be with you or not, she will understand when you talk to her about it.

Greed doesn't just have to be over wealth, right? Being greedy can be acting selfishly over a number of things; just because they make you feel good. Being greedy with a person and the time you spend with them isn't all bad. And being greedy about pie is only bad for the person when they are eating themselves into diabeetus.